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how to Distinguish AgNO3 from Ba(NO3)2 and how to distinguish NaCl from NaI if they were in a test tube without being labeled
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- The digestion of a 0.1159 gram sample of a phosphorous-containing compound in a mixture of HNO3 and H2SO4 resulted in the formation of CO2, H2O, and H3PO4. Addition of ammonium molybdate yielded a solid having the composition (NH4)3PO4·12MoO3 (FW = 1876.3). This precipitate was filtered, washed, and dissolved in 50.00 mL of 0.2000 M NaOH: (NH4)3PO4•12MoO3(s)+26OH-(aq)->HPO42-(aq)+12MoO42-(aq)+14H2O(l)+3NH3(g) After the solution was boiled to remove the NH3, the excess NaOH was back-titrated with 14.84 mL of 0.1626 M HCl to a phenolphthalein end point. Calculate the percent phosphorous (FW = 30.9737) in the sample.The cumulative formation constants for the reaction of Co21 with ammonia are log b1 5 1.99, log b2 5 3.50, log b3 5 4.43, log b4 5 5.07, log b5 5 5.13, and log b6 5 4.39. (a) Write the chemical reaction whose equilibrium constant is b4. (b) Write the reaction whose stepwise formation constant is K4 and find its numerical value.AgOH(s) + H3O*(ag) + Cl-(aq) 2 AgCl(s) + 2H2O (R11) Write out the reactions that would occur if nitric acid was used instead of hydrochloric acid.
- The concentration of Cl– in a 100.0-mL sample of water drawn from a fresh water acquifer suffering from encroachment of sea water, was determined by titrating with 0.0516 M Hg(NO3)2. The sample was acidified and titrated to the diphenylcarbazone end point, requiring 6.18 mL of the titrant. Report the concentration of Cl– in parts per million.(8) Answer each of the following questions: (a) Ka for HNO2 is 4.6 x 10-4. What is the Kb for its conjugate base ? (b) Calculate the pH of 0.1 M of HNO2 solution using the ka above.Mass of KxFe(C2O4)y · zH2O : 5.60 g Mass of sample : 0.155 g Mass of FeCl3 used in preparation : 1.60 g Molarity of standard NaOH used : 0.100 V1, volume of standard NaOH required for first equivalence point : 9.000 mL V2, volume of standard NaOH required for second equivalence point : 15.90 mL Calculate the volume of standard NaOH that reacted with iron :
- Write the reaction of PCl5 with heavy water.2) What are the values of E, pe and AG for the reaction in 1-i) when pH=8, [Mn²+]=10-4 M, [12(aq)]=10-6 M and [I]=10-³ M? Is the reaction at equilibrium? If not, which direction is it proceeding under these conditions?1. It is assumed for the calibration solutions that all of the SCN is converted to FESCN2*. What would happen to the calculated Keq if this assumption were incorrect? 2. A student mixes 5.00 mL of 2.00 mM iron (III) nitrate with 5.00 mL of 2.00 mM sodium thiocyanate. The student determines that the concentration of FeSCN2* is 1.05x104 M. Calculate Keg-